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G. W. A FITZ GEORGE 8: H. J. BROWN. APPARATUS FOR ENAMBLING PAPER.

Patented Jan. 18, 1898.

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UNITED STATES PATENT Orrrcn,

GEORGE W. A. FITZ GEORGE, OF LONDON, AND HAWTHORN J. BROWN,

OF SOUTH DARENTH, ENGLAND.

APPARATUS FOR ENAMELING PAPER.

SPECIFICATION forming part of Letters Patent No. 597,405, dated January18, 1898.

Application filed June 15, 1896. Serial No 695,660. (No model.) Patentedin England October 16,1895,No. 19,471; in Germany June 7,1896,No;92,166;in France June 22,1896, No. 257,457; in Belgium June 22, 1896,No. 122,079; in Norway October 12,1896,ll0, 5,468, andin Austria March30, 1897, No. 47/l,088.

T0 a-ZZ whom it may concern.-

Be it known that we, GEORGE l'VILLIAM ADOLPHUS Frrz GEORGE, of 37 QueenVictoria Street, London, and HAWTHORN Janus BROWN, of South Darenth,Kent county, Eng land, subjects of the Queen of Great Britain andIreland, have invented certain new and useful Improvementsin Apparatusfor Enamcling Paper, of which the following is aspecification.

The invention has been patented in Great Britain, No. 19371, datedOctober 16, 1895; in Germany, No. 92,166, dated June 7, 1896; in France,No. 257,457, dated June 22, 1896; in Belgium, No.122,()79, dated June22, 1896; in Norway, No. 5,466, dated October 12, 1896; and in Austria,No. 47/1,088, dated March 30, 1897.

0 ur invention relates to the manufacture of coated or enameled papersuitable for artistic printing; and it consists in a process wherebypaper can be evenly and very efficiently coated or enameled on bothsides simultaneously with the making of the paper, thus obviating theseparate and costly process of coating or enameling the paper after itis made, as hitherto practiced.

By our invention we overcome a difficulty I which, so far as we know,has heretofore always proved insuperableviz., the even ap plication toand distribution upon the web while in a more or less damp state of thecoat in g solution, which is necessarily of high specific gravity ordensity, thick consistency, and sticky nature, for which reasons itrequires special appliances to insure its efficient and even applicationto and without injuring the web.

According to our invention a tank containing coating solution ofsuitable density is placed about the middle of the group ofdrying-cylinders of the ordinary paper-making machine. lVlien thecontinuous Web reaches this point, it is intercepted on thedryingcylinders, which are equipped with the usual drying-felts, andpassed through the coating solution contained in a tank; thence itpasses upwardly between a pair of specially-con structe'd radialmotion-adjustable scrapers,

hereinafter termed adjusters, for surface leveling and taking oif thesuperfluous coating; nextbetween a pair of felt covered squeezing-rolls;then, if necessary, over opensparred drying-drums to the remainingordinary drying-cylinders and along the machine in the ordinary course.Thus the finished product is a paper evenly enameled on both sides andof unimpaired strength;

The annexed drawing represents in side elevation the middle part of thegroup of dryin g-c-ylinders of a papermaking machine havin g ourinvention applied thereto. The drying-cylinders of the machine arespaced apart, preferably about the mid-len gth of the group, so as tohave about an equal number at either side of a gap sufficiently long toadmit of the introduction of our apparatus.

1) represents the last drying-cylinder of one part of the set, and D thefirst of the other part of the set, all being mounted in the usualmanner on the frame F.

T is the tank containing the coating solution fixed to the machine-frameF, through which solution the continuous web of paper W is passedfrom 1) to D over and under suit-able leading-rolls, such as L L. Thesolution may be of any usual or preferred COlllposition-such as blancfine, china-clay, calcium sulfate, or mixtures thereof withappropriatefiXing-and its specific gravity may vary between 1.100 and1.250 (or 20 to 50 Twaddells hydrometer,) according to circumstances.The specific gravity of any cnameling solution is, however, much higherthan that of the solutions used in the known processes of tub'sizing,hard sizing, and the like, and hence great care is essential in usingsame. Afterhavin g been thus passed through the coating solution in thetank '1 and being completely and thickly covered therewith the Webpasses first between a pair of adjusters A A-one above and the otherbelow the coated web. T hose scrapers extend transversely across thefull width of the web, and their axes are pivoted to bearings a a on thetank T, so as to afford a radial movement,

